Here's my opinion what NE is doing.
BB as a GM has had more 2nd round picks than any other teams over recent years. The other teams started following suit.
Now the trend is to trade draft picks for young players with proven experience. Actually makes sense since draft picks can bust.
This is part of the reason what NE is doing this year.
2nd if you're riding a wave why bust it- improve even more and keep riding that winning wave.
3rd. Is NE going for it all this year. Sure but I don't think it's because BB is retiring anytime soon. Brady who knows so yeah I would say that's part of the thinking. But it's not the same other teams have done in the past where they haven't won a SB recently and trade for "older" veteran stars...something like what Denver did.
BB got younger players which is sorta like a draft pick without the risk other than the usual risks-injury etc.